Guidance for coding a simple indicator

[pdev]

Hi, I am new to MT5 and need some guidance to get started in programming MQL5. I am trying to write a simple indicator that:

1) Puts a Green Up arrow at the low of a bar when: the given bar's range (close - open) is more then that of bar 3 periods before

2) Puts a Red Down arrow at the high of a bar when: the given bar's range (close - open) is less then that of bar 3 periods before

For eg: if bar[0] is the current bar and if bar[3] is the bar 3 periods ago and 

IF (bar[0].open - bar[0].close) > (bar[3].open - bar[3].close)

    then put a GREEN UP arrow at the low of bar[0]

ELSE

   put a RED DOWN arrow at the high of bar[0]

Would be very helpful if someone can provide MQL5 code for this.

Thanks in advance !

[Jose Francisco Casado Fernandez]

You can search in CodeBase or in the Market. If no luck, you can hire someone to code it for you in Freelance section.  Regards.